Amos call



(No Model.) I

A. CALL.

WRENCH.

No. 317,923. I Patented May 12, 1885. w

WITNESSES NVEgR ATTO RN EY UNIT D STATES PATENT Cruise.

AMOS CALL, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO THE BEMIS & CALLHARDWARE AND TOOL COMPANY, OF SAME PLACE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 817,923, dated May 12,1885.

Application filed September 25, 1884. (No model.)

To all whom it may concern:

Be it known that 1, Aims CALL, a citizen of the United States, residingat Springfield, in the county of Hampden and State of Massachusetts,have invented new and useful Improvements in Wrenches, of which thefollowing is a specification.

This invention relates to improvements in wrenches, in which areembodied in a single wrench devices adapted to serve as a monkeywrench,and others possessing different characteristics, and peculiarlycalculated to meet the requirements of a wrench for gripping and turningcylindrical objectssuch as pipes and round iron or other similararticles-the ob ject being to embrace in one tool or implement suitableoperative elements for serving to the best advantage the above-named twopurposes, but in which neither of the said elements can, eitherseparately or combined, so act as to impair the efficiency of the wrenchfor either of the purposes for which it is constructed.

In the drawings forming part of this specification,Figure l isa sideelevation of a wrench constructed according to my invention. Fig. 2 is aside view partly in section. Fig. 3 is a side view of the wrench abovethe handle, showing the position of the pipe-gripping lower jaw when thewrench is being used to turn a pipe.

In the drawings, a is the bar of the wrench, having thereon the usualhandle, n, and the double jawed or branched head D, the said bar havinga screw-thread formed thereon,on which the swivel-nut 2 turns for thepurpose of moving the jaw-slides on the bar, said slides having ahook-like engagement with the nut zby means of a groove around it nearone end,in the usual manner. One of the branches, 2), of said head Dconstitutes a fixed monkey-wrench jaw, having a plain face at rightangles to the contiguous side of the bar a, and the opposite branch, d,of said head, to the under face of which is secured a serrated-facedgrippingdog, f, constitutes a fixed pipe-wrench jaw, the under face ofsaid dog being upwardly inclined relative to the contiguous side of thebar a.

Heretofore wrenches have been constructed for the double use as monkeyand pipe wrenches, in which a single jaw-slide is provided with aplain-faced monkey-wrench jaw and with a serrated pipe-j aw located onopposite sides of the bar of the wrench; but such constructions, so faras I am familiar with them, embody practical disadvantages which areobviated by the improved construction herein shown and described.

The said improved wrench, as herein shown 6c and described, is made withits monkeywrench-jaw slide separate from the pipe-jaw and its slide, andthe yokesla 7c of the former encircle the bar a in the usual manner, butare well fitted thereto, in order to prevent any vibra- 6 tion of saidslide when operating to turn a nut or other object, the swivel-nut 2serving to move said slide to and from the fixed jaw b.

The pipe-wrench-jaw slide, unlike that of the monkey-wrench,is purposelymade to have a vibratory motion by the side of the bar a, and relativeto the opposite jaw, 01, in order to permit the jaw 6, having the dogt'thereon, to effect a cam-grip on the pipe on, which description of gripis essential in a pipewrench, because thereby the teeth of the serratedjaws f and t become forced more or less into the surface of the pipe,and are consequently prevented from slipping thereon.

In order to allow said pipe-wrench-j aw slide 8 to vibrate, asaforesaid, the yokes 'u 12 thereof are fitted loosely around the bar a,and a spring, 20, is interposed between the upper yoke 12 and the innerside of jaw c, to throw the jaw e away from bar a, leaving an open- 8ing, 0, between the dog t and the end of the upper yoke 76, which isclosed up, or-iiearly so, when the wrench is in use in turning anobjeot, as illustrated in Fig. 3, and when the wrench is free, or thejaw t is retired from the pipe m, the spring to swings the jaw outwardagain, as shown in Figs. 1 and 2, the jaw a during said operation of jaw0 remaining in its parallel relation to the jaw 12, as above described.9 5

Any other suitable spring than spring to may be employed for the purposeset forth above, and may be located at any other convenient point thanbetween yoke 11 and the side of jaw c, or the pipe-wrench may be used(but not as conveniently) without a spring.

The dogs and t are secured. to their respective jaws d and e by screws,as shown, so that a broken or worn-out jaw may be easily replaced by anew one. vThe faces of said dogs stand at an incline to each other, asshown in Figs. 1 and 2, so that the cylindrical object as the wrench isforced upon it is rolled toward the bar a, and in so moving becomes moreand more tightly gripped between the aws.

The movable dogs f and i may be dispensed with, if desired, by makingthejaws d and e of steel and hardening them and giving them the properforms.

What I claim as myinvention is- 1. In combination with a screw-threadedwrench-bar having fixed head projecting at opposite sides of the bar, amovable head at one side of the bar, having close-fitting yokes ing atopposite sides thereof, and in combina-.

tion therewith a movable jaw having yokes closely embracing the bar, anda movable jaw having yokes lbosely embracing the bar alternating withsaid first-mentioned yokes, and a spring interposed between the movablejaws to press them apart laterally, all substantially 30 as described.

AMOS CALL.

Witnesses:

H. A. CHAPIN, I J. D. GARFIELD.

